'use strict';
const path = require('path');
const defaultSettings = require('./src/settings.js');
// 文件复制插件
const CopyPlugin = require('copy-webpack-plugin');

function resolve(dir) {
  return path.join(__dirname, dir);
}

const name = defaultSettings.title || 'vue Admin Template'; // page title

// If your port is set to 80,
// use administrator privileges to execute the command line.
// For example, Mac: sudo npm run
// You can change the port by the following methods:
// port = 9528 npm run dev OR npm run dev --port = 9528
const port = process.env.port || process.env.npm_config_port || 9528; // dev port

// All configuration item explanations can be find in https://cli.vuejs.org/config/
module.exports = {
  /**
   * You will need to set publicPath if you plan to deploy your site under a sub path,
   * for example GitHub Pages. If you plan to deploy your site to https://foo.github.io/bar/,
   * then publicPath should be set to "/bar/".
   * In most cases please use '/' !!!
   * Detail: https://cli.vuejs.org/config/#publicpath
   */
  publicPath: '/dashboard', outputDir: 'dist', assetsDir: 'static', lintOnSave: process.env.NODE_ENV === 'development', productionSourceMap: false, // configureWebpack: {
  //     // provide the app's title in webpack's name field, so that
  //     // it can be accessed in index.html to inject the correct title.
  //     name: name,
  //     resolve: {
  //         alias: {
  //             '@': resolve('src')
  //         }
  //     }
  // },
  configureWebpack: (config) => {
    // 开发生产共同配置别名
    Object.assign(config.resolve, {
      alias: {
        '@': resolve('src')
      }
    });
    // 拷贝static中的资源文件
    config.plugins.push(new CopyPlugin([{
      from: 'static', to: 'static', toType: 'dir', ignore: ['.DS_Store']
    }]));
  }, chainWebpack(config) {
    // it can improve the speed of the first screen, it is recommended to turn on preload
    config.plugin('preload').tap(() => [{
      rel: 'preload', // to ignore runtime.js
      // https://github.com/vuejs/vue-cli/blob/dev/packages/@vue/cli-service/lib/config/app.js#L171
      fileBlacklist: [/\.map$/, /hot-update\.js$/, /runtime\..*\.js$/], include: 'initial'
    }]);

    // when there are many pages, it will cause too many meaningless requests
    config.plugins.delete('prefetch');

    // set svg-sprite-loader
    config.module.rule('svg').exclude.add(resolve('src/icons')).end();
    config.module
      .rule('icons')
      .test(/\.svg$/)
      .include.add(resolve('src/icons'))
      .end()
      .use('svg-sprite-loader')
      .loader('svg-sprite-loader')
      .options({
        symbolId: 'icon-[name]'
      })
      .end();

    config.when(process.env.NODE_ENV !== 'development', (config) => {
      config
        .plugin('ScriptExtHtmlWebpackPlugin')
        .after('html')
        .use('script-ext-html-webpack-plugin', [{
          // `runtime` must same as runtimeChunk name. default is `runtime`
          inline: /runtime\..*\.js$/
        }])
        .end();
      config.optimization.splitChunks({
        chunks: 'all', cacheGroups: {
          libs: {
            name: 'chunk-libs', test: /[\\/]node_modules[\\/]/, priority: 10, chunks: 'initial' // only package third parties that are initially dependent
          }, elementUI: {
            name: 'chunk-elementUI', // split elementUI into a single package
            priority: 20, // the weight needs to be larger than libs and app or it will be packaged into libs or app
            test: /[\\/]node_modules[\\/]_?element-ui(.*)/ // in order to adapt to cnpm
          }, commons: {
            name: 'chunk-commons', test: resolve('src/components'), // can customize your rules
            minChunks: 3, //  minimum common number
            priority: 5, reuseExistingChunk: true
          }
        }
      });
      // https:// webpack.js.org/configuration/optimization/#optimizationruntimechunk
      config.optimization.runtimeChunk('single');
    });
  }, // 参考webpack-dev-serve
  devServer: {
    port: port, open: true, overlay: {
      warnings: false, errors: true
    }, proxy: {
      '/dev': {
        target: 'http://127.0.0.1:8060', // 本地开发环境
        changeOrigin: true, pathRewrite: {
          '^/dev': '/'
        }
      }
    }
  }
};
